Electrically-controlled actuators
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United States of America Patent
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Mar 24, 1987
Grant Date -
N/A
app pub date -
May 7, 1984
filing date -
Jun 17, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electrically-controlled force-exerting actuator comprising a force-applying power spring arranged to exert a force on an output member, a force-applying control spring arranged with respect to the power spring such that the force exerted by the control spring is detracted from the force exerted by the power spring to determine the residual force exerted on the output member by the power spring, and an electric motor operable to vary the detractive force exerted by the control spring.
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